No issues with paleoartists depicting sick animals, but when you've got an entire environment populated by them, it sure looks like a Mesozoic plague is happening!

Update:
Christoph was kind enough to point me to some photos of healthy crocodiles from the same Philippine farm. These are Mindoro, or Philippine Crocodiles, and Christoph notes that our poor, sick, friend above may be the same.

Shrink wrapping method is same for all products irrespective of size and brittleness. The process is so simple that it can be easily done in DIY (do it yourself) procedure. Some artists do shrink wrapping to protect their paintings from dust and also to give it a professional look.